The phrase "flying vermin" is correct and usable in written English.
It can be used to refer to birds or other creatures that are considered pests or nuisances.
Example: "The park was filled with flying vermin, making it difficult to enjoy a peaceful afternoon."
Alternatives: "winged pests" or "aerial nuisances".
Only then will these flying vermin get the message that they're not welcome anymore.
Overhead, a gang of the local flying vermin took off from some unseen perch, swooped, and seemed to be zeroing in on Archie's car roof - only to perform, at the last moment, an impressive U-turn, moving as one with the elegance of a curve ball and landing on the Hussein-Ishmael, a celebrated halal butchers.
Zagat's 2008 top-rated restaurants were all impeccable (Daniel, Sushi Yasuda, Le Bernardin, Per Se, Jean Georges) except for Peter Luger (vermin, flying insects, live mice, oh my!) and Bouley (a humiliating 57 points in September, 2007).
(A weenie whoooosh? Tiny, sarcastic notes left under the refrigerator? Soft giggling from the fruit basket?) Two days later, at another inspection, not only did the facility remain open to vermin, there was still evidence of flying insects, and the additional presence of... mice!
Not only was his cold food held above 41 degrees and his hot food held below 140 (prime bacteria breeding ground on both counts), but his facility wasn't vermin-proof and there was evidence of flying insects.
A procession of the species that armies have used to carry supplies or haul guns, or fly messages or kill vermin, marches across a frieze: elephants, camels, horses, bullocks, donkeys, a flight of pigeons, a dog, a cat.
Hawks flew above it, searching for vermin.
By tying tigers and flies into one single frame of VERMIN, the slogan profiles the corrupt officials' harmfulness and destructiveness to the people and the party's determination to act upon them aggressively.
The anti-chicken faction, which has gathered about 160 signatures on a petition protesting the hens, charged that they would bring stink, vermin, flies, lead poisoning and possibly even avian flu into the neighborhood.
Welsh assembly shadow environment minister Russell George said: "Overflowing and festering bins caused by less frequent collections will increase fly-tipping, encourage vermin and other pests and litter Welsh streets".
